Dynamo-electric machine.



Patanted Feb. 6, I900.

0. w. KRAGH. DYNAMO ELECTRIC MACHINE.

( Application filed Sept. 11, n99.

(No Model.)

jive 7ZZL07 1% zwyzg UNITED STATES PATENT OFF CE.

CHRISTIAN IV. KRAGII, OF MADISON, WISCONSIN, ASSIGNOR TO THE NORTH- ERN ELECTRICAL MANUFACTURING COMPANY, OF SAME PLACE.

DYNAiVlO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 642,615, dated February 6, 1900.

Application filed $epbeml3er 11, 1899. Serial No. 7 30,058. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHRISTIAN W. KRAGH, a citizen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have invented a certain new and useful Improvement in Dynamo Electric Machines, of which the following is a specification.

My invention relates to dynamo-electric machines, and has for its object to providea new and improved machine of this description particularly adapted to be operated as a motor.

My invention is illustrated in the accompanying drawings, wherein' Figure 1 is a view of a device embodying my invention. Fig. 2 is a section through the device shown in Fig. 1, with parts omitted, showing the construction of the lower bearing. Fig. 3 is aview of the device as seen from beneath. Fig. 4 is a view of the rings which hold the balls of the armature-bearing in place. Fig. 5 is a section on line 5 5, Fig. 4.

Like letters refer to like parts throughout the several figures.

I have illustrated my invention as applied to motors adapted to be directly connected to vertical shafts. It is of course evident that any suitable form of motor may be used, and I have not illustrated in detail the construction of the armature, field-magnets, &c., as they are no part of my present invention. When the motor-shaft is to be directly connected to a vertical driven shaft, the motor must be set on end. In the construction shown in the drawings the motor proper is contained within the frame A. This frame is provided with an end piece 13, carrying the lower bearing for the armature-shaft B and having integral therewith the supporting-legs C C, which project downwardly past the bearing and which engage a suitable supporting device, so as to hold the motor in the proper position. It will be noted that in this construction the end piece, the bearing, and the supporting-legs are formed integral and pref erably consist of a single casting. This casting is removably connected with the frame A by means of suitable bolts D. I have shown the device as provided with three supporting legs; but it is of course evident that the number of supporting-legs may be varied, if desired. The armature-shaft projects beyond the bearing in the end piece and is adapted to be connected with the vertical shaft B by means of a suitable clutch or other mechanism B It is of course evident that the motor may be connected with any suitable devicesuch, for example, as centrifugal pumps or any other mechanism having a vertical shaft. Referring now to Fig. 2, I have shown in detail the construction of the lower bearing E of the armature-shaft. This bearing is preferably made up of two sections, the upper section E surrounding the shaft and forming the ordinary bearing to prevent lateral movement. The lowerportion is particularly adapted to take care of the longitudinal thrust of the shaft due to the weight of the armature and consists of a suitable supportingpiece E removably connected with the end piece B and provided with the annular projection E upon which are mounted suitable balls E upon which the shaft is supported. As herein shown, the shaft is reduced just before passing through the lower part of the bearing, so as to form a shoulder E The balls are provided with a suitable holding device, which consists of the rings E E one engaging the annular projection E and the other the shoulder on the shaft. The balls are placed between these rings and are held in the proper relative position by means of the holders E These holders consist of metallic rings provided with a series of openings E (See Fig. 4'.) The several balls are engaged by these openings, as shown in Fig. 2, and are thus kept in the proper relative position. The frame A is open at both ends and is provided with an upper end piece car- 0 rying a suitable bearing for the upper end of cient means for directly connecting motors to vertical shafts or to shafts Where the motor must be supported on the end.

I have described in detail the particular construction set out in the drawings; but it is of course evident that the form, construction, and arrangement of the parts may be Varied without departing from the spirit of my invention.

I claim 1. The combination with a motor havinga Vertical armature-shaft of a suitable frame inclosing the armature, an end piece connected with said frame, said end piece provided with a suitable bearing for the shaft and having connected therewith a projecting supporting device which extends beyond the bearing and upon which the motor is supported.

2. The combination with a motor of an end piece provided with a bearing for the motorshaft, and having projecting legs suitably spaced around said bearin g and projecting beyond the bearing, the motor being supported upon said legs.

3. An end piece for motors, comprising a bearing for the motor-shaft said shaft extending beyond the bearing and a series of projecting legs integral with the piece containing the bearing and projecting beyond the face of the bearing, so as to act as supports for the motor.

4. The combination With an electric motor of a frame surrounding the armature of the motor, an end piece carrying a bearing through which the motor-shaft projects, a portion of said end piece projecting past the face of the bearing, so as to act as a supporting part for the motor, said supporting part, end piece and bearing being formed in a single piece.

5. A bearing for vertical shafts, consisting of two parts, one part through which the shaft projects acting as the bearing proper to prevent lateral motion, the other part comprising a series of balls past which the shaft proj ects, the shaft being provided with a shoul der so as to be supported upon said balls.

6. The combination with a motor having a vertical shaft of an end piece connected with said motor and provided with downwardlyprojecting parts which act as supports for the motor, said end piece provided with a bearing through which the shaftprojects and consist ing of two parts, one surrounding the hearing so as to prevent lateral motion, the otherconsisting of a series of balls which engage the shaft and take up the end thrust.

7. An electric motor, comprising an armature, a vertical shaft therefor, a frame eXtending around the armature and open at its lower end, an end piece removably attached to the open end of said frame and having a bearing integral therewith through which the armature-shaft projects, a portion of said end piece projecting downwardly past the bearing and acting as a support for the motor.

CHRISTIAN V. K RAGH.

Vitn esses:

FRANK L. S'rAco, AUGUs'r J. BUENZLI. 

